In a 'normal' ear the auditory filter has a shape similar to the one shown below.

A sound which causes no discomfort to normal ears may seem unpleasant or painfully loud.

Newborn children with no hearing on one side but one normal ear could still have problems.

It was so low that the normal ear would have missed it.

To the normal ear, even with amplification, the clicks would have seemed uniform.

Healing of the area can result in a more normal ear drum.

It is hard to imagine what could happen to normal ears trapped at that table.

To normal ears there was nothing to be heard shut away here below the city.

In contrast, a pronounced nose was often a sign, as were larger than normal ears, teeth or eyes.

To a normal ear, to be sure, it reeked with hypocrisy and deception.